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  • Lifecycle status

    Discontinued
    Discontinued date: 2017-07-31
    Replacement category: Engineering Replacement

1785-L80C

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Allen-Bradley 1785-L80C is an earlier-generation PLC-5/80C controller with integrated ControlNet communication for use in a compatible 1771 chassis.
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Technical specifications for 1785-L80C

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1785-L80C
  • Product Family:
    PLC-5
  • Product Type:
    PLC-5/80C ControlNet 1.25 Processor
  • Stock:
    1
  • Processor Designation:
    PLC-5/80C
  • ControlNet Phase:
    1.0 or 1.25 family
  • ControlNet Channels:
    1 onboard channel
  • Serial Communication:
    Supported
  • Data Highway Plus:
    Supported
  • Remote I/O:
    Supported
  • Chassis Platform:
    1771 I/O chassis
  • ControlNet port:
    1 logical port with redundant media connectors and one network access port
  • Chassis location:
    leftmost slot in a supported 1771 chassis
  • Network access cable:
    1786-CP
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals ControlNet Phase Identity Control Migration Review Application
  • Confirm the installed nameplate and ControlNet phase before treating later suffixed processors as interchangeable
  • Preserve the controller project, network records, and 1771 chassis configuration before replacement
  • Review migration compatibility carefully when moving from this earlier ControlNet processor generation to newer hardware

1785-L80C identifies the PLC-5/80C catalog used before the 1.5-generation suffix was introduced.

That distinction matters because ControlNet phase is part of system compatibility rather than merely a change in the printed catalog number.

A replacement decision should begin with the installed nameplate and network records, then proceed to the controller project and chassis configuration.

Availability, condition, price, and shipping time for 1785-L80C are confirmed during quotation.

Allen-Bradley 1785-L80C PLC-5/80C ControlNet 1.25 Processor Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • The official hardware table places 1785-L80C in the ControlNet 1.0 and 1.25 group.
  • ControlNet 1.5 processors use the distinct 1785-L80C15 catalog.
  • Network phase must match the installed nodes and scheduled configuration.
  • The exact processor catalog is 1785-L80C.
  • Official certification identifies the PLC-5/80C processor as Series E.
  • Nameplate and network records should be captured before removal.
  • Rockwell Automation classifies the product as discontinued with engineering replacement.
  • A migration requires application and ControlNet architecture review.
  • Validate every rack, peer, HMI, and network consumer after any processor change.
  • PLC-5/80C installations built around the earlier ControlNet 1.0 or 1.25 generation.
  • Legacy controller replacement where the Series E identity and network phase are verified.
  • Engineering migration studies that distinguish L80C from the later L80C15 catalog.
Description
Allen-Bradley 1785-L80C is the high-capacity PLC-5/80C controller catalog used in the earlier ControlNet 1.0 and 1.25 processor family.

Official product identification separates this model from the later 1785-L80C15 ControlNet 1.5 processor even though both belong to the PLC-5/80C line.

Selection must therefore be based on the exact catalog, Series E hardware, installed ControlNet phase, controller project, network schedule, chassis arrangement, and memory requirement.
Revisions

Revision Part #

Also known as

1785-L80C Ser E
1785-L80C/E, Series E, Rev E
Alternative Names
1785-L80C Allen-Bradley 1785-L80C Allen Bradley 1785-L80C PLC-5/80C 1785-L80C Bulletin 1785-L80C
Technical notes
1785-L80C selection depends on Series E identity, ControlNet 1.0 or 1.25 compatibility, saved project, network schedule, node configuration, chassis, and memory use; 1785-L80C15 is not automatically equivalent.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Can the existing ControlNet schedule be reused after installing Allen-Bradley 1785-L80C?
Reuse it only after confirming that the replacement has the same catalog and Series, and that the saved schedule, node identity, keeper information, and connected ControlNet devices still match the installation.
What compatibility evidence should be collected before ordering Allen-Bradley 1785-L80C?
Record the installed nameplate, Series E marking, ControlNet phase, network schedule, node configuration, chassis, memory use, and the exact PLC-5 project.
Does Allen-Bradley 1785-L80C require the original ControlNet files to restore a stopped system?
A verified controller project and the matching network schedule are normally required; rebuilding from memory risks incorrect node ownership, update timing, rack communication, and peer messaging.
Why might Allen-Bradley 1785-L80C fail after loading an otherwise valid PLC-5 project?
The project may not match the installed ControlNet phase, scheduled network, rack allocation, channel setup, memory organization, or firmware expected by the hardware.
What should be retained before decommissioning Allen-Bradley 1785-L80C?
Keep the verified project, data-table backup, network keeper and schedule information, node address, channel configuration, rack plan, and nameplate photographs.
Is a later ControlNet processor automatically a functional replacement for Allen-Bradley 1785-L80C?
No. Rockwell Automation lists engineering replacement status, so the application and network must be reviewed rather than treating a later catalog as a drop-in replacement.
Why must maintenance distinguish Allen-Bradley 1785-L80C from Allen-Bradley 1785-L80C15 during an emergency replacement?
The two catalogs belong to different ControlNet generations, so substituting by appearance can leave the controller unable to use the installed schedule or communicate correctly with existing nodes.